React Native’s AsyncStorage

AsyncStorage is a data storage system in React Native. That is a simple, unencrypted, asynchronous, and allows users to stores the data globally in the app. It store data in the form of a key-value pair.

AsyncStorage is also asynchronous, allows your application to continue functioning smoothly without waiting for AsyncStorage operations to complete, and it’s persistent, meaning that the stored data will always be available globally even if you close your application ,log out  and restart any other activity to perform application

How AsyncStorage works

AsyncStorage is accepts and stores only string data. It's commonly used for storing small amounts of data such as user preferences, authentication tokens, or cached data.

1. Initialization

Install package in your project npm install @react-native-async-storage/async-storage

you are simply import it  in components &project like this  import AsyncStorage from '@react-native-async-storage/async-storage';

2. Store Data

To store data use setItem method. This method takes a key-value pair and stores it asynchronously.

3. Getting Data

To store data use getItem method. This method takes a key. If the key exists so return data or data is null so key doesn't exist.

4. Remove Data

To remove data, you use the removeItem method. This method takes a key and removes data.